<template>
    <div>

        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card>
            <el-alert
                title="添加商品信息"
                type="info"
                show-icon
                :closable="false">
            </el-alert>

            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center="">
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">

                <!-- Tabs标签页 -->
                <el-tabs
                    :tab-position="'left'"
                    v-model="activeIndex"
                    :before-leave="beforeTabLeave"
                    @tab-click="tabclicked">

                    <el-tab-pane label="基本信息" mame='0'>
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>

                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品数量" prop="goods_number" type="number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                clearable
                                :options="catelist"
                                :props="cateProps"
                                v-model="addForm.goods_cat"
                                @change="handleChange">
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>

                    <el-tab-pane label="商品参数" mame='1'>
                        <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox border :label="cb" v-for="(cb,index) in item.attr_vals" :key="index"></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>

                    <el-tab-pane label="商品属性" mame='2'>
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>

                    <el-tab-pane label="商品图片" mame='3'>
                        <el-upload
                            :headers="headerObj"
                            action="https://lianghj.top:8888/api/private/v1/upload"
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            list-type="picture"
                            :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            </el-upload>
                    </el-tab-pane>

                    <!-- 富文本编辑器 -->
                    <el-tab-pane label="商品内容" mame='4'>
                        <quill-editor v-model="addForm.goods_introduce"/>
                        <el-button type="primary" class="btnAdd" @click="addSubmit">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>

            </el-form>

        </el-card>

    <el-dialog
        title="图片预览"
        :visible.sync="imgDialogVisible"
        width="50%">
        <img :src="previewPath" alt="">
    </el-dialog>

    </div>
</template>

<script>
import _ from 'lodash'
export default {
name:'Add',
created(){
    this.getCateList()
},
data() {
    return {
        activeIndex:'0',
        //添加商品的表单数据对象
        addForm:{
            goods_name:'',
            goods_price:0,
            goods_weight:0,
            goods_number:0,
            //商品种类
            goods_cat:[],
            //图片数组
            pics: [],
            //商品详情
            goods_introduce:'',
            attrs:[]
        },
        addFormRules:{
            goods_name:[
                {required:true,message:'请输入商品名称！',trigger:'blur'}
            ],
            goods_price:[
                {required:true,message:'请输入商品价格！',trigger:'blur'}
            ],
            goods_weight:[
                {required:true,message:'请输入商品重量！',trigger:'blur'}
            ],
            goods_number:[
                {required:true,message:'请输入商品数量！',trigger:'blur'}
            ],
            goods_cat:[
                {required:true,message:'请选择商品分类！',trigger:'blur'}
            ]
        },
        catelist:[],
        cateProps:{
            expandTrigger:'hover',
            value: 'cat_id',
            label: 'cat_name',
            children: 'children',
        },
        //动态参数
        manyTableDate:[],
        onlyTableDate:[],
        //图片上传组件 请求头带有 token 参数
        headerObj:{
            Authorization: window.sessionStorage.getItem('token')
        },
        imgDialogVisible:false,
        //图片地址
        previewPath:''
    }
},
computed:{
    cateId(){
        if (this.addForm.goods_cat.length === 3) {
            return this.addForm.goods_cat[2]
        }
        return null
    }
},
methods:{
    async getCateList(){
        const {data: res } = await this.$http.get('categories')
        if(res.meta.status !== 200) return this.$message.error('获取商品分类数据失败！')
        this.catelist = res.data
    },
    handleChange(){
        if (this.addForm.goods_cat.length !==3) {
            this.addForm.goods_cat = []
            return this.$message.error('只能选择三级分类！')
        }
    },
    //tabs离开前事件
    beforeTabLeave(activeName,oldActiveName){
        if (oldActiveName === '0' && this.addForm.goods_cat.length!==3) {
            this.$message.error('请先选择商品分类！')
            return false
        }
    },
    //tab点击事件
    async tabclicked(){
        if (this.activeIndex === '1') {
            const {data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'many'}
            })
            if(res.meta.status !== 200) return this.$message.error('获取动态参数列表失败！')
            res.data.forEach(item => {
                item.attr_vals = item.attr_vals.length ===0 ? [] : item.attr_vals.split(' ')
            })
            this.manyTableDate = res.data
        } else if(this.activeIndex === '2') {
             const {data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'only'}
            })
            if(res.meta.status !== 200) return this.$message.error('获取静态参数列表失败！')
            this.onlyTableDate = res.data
        }
    },
    //点击图片处理效果
    handlePreview(file){
        console.log(file);
        this.previewPath = file.response.data.url
        console.log(this.previewPath);
        this.imgDialogVisible = true
    },
    //移除图片
    handleRemove(file){
        //获取将要删除的图片的临时路劲
        const filePath = file.response.data.tmp_path
        //从pics数组中。找到这个图片的索引值
        const i = this.addForm.pics.findIndex(x=>{
            x.pic === filePath
        })
        //调用数组的splice方法，从pics数组中删除
        this.addForm.pics.splice(i,1)
    },
    //图片上传成功的事件
    handleSuccess(response){
        console.log(response);
        //拼接得到一个图片信息对象
        const picInfo = {pic: response.data.tmp_path}
        //将图片信息对象push到数组中
        this.addForm.pics.push(picInfo)
    },
    //提交添加商品
    addSubmit(){
        this.$refs.addFormRef.validate(async valid =>{
            if (!valid) {
                return this.$message.error('请填写表单的必填项目！')
            }
            //执行添加的业务逻辑

            //处理静态参数
            this.onlyTableDate.forEach(item => {
                const newIfo ={
                    attr_id: item.attr_id,
                    attr_value: item.attr_vals
                }
                this.addForm.attrs.push(newIfo)
            })
            //处理动态参数
            this.manyTableDate.forEach(item => {
                const newIfo ={
                    attr_id: item.attr_id,
                    attr_value: item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newIfo)
            })
            //把goods_cat数组变为 以逗号分隔的字符串
            const form = _.cloneDeep(this.addForm)
            form.goods_cat = form.goods_cat.join(',')

            //发起请求
            const {data: res } = await this.$http.post('goods',form)
            if(res.meta.status !== 201) return this.$message.error('添加商品失败！')
            this.$message.success('添加商品成功！')
            this.$router.push('/goods')
        })
    }
}
}
</script>

<style lang='less' scoped>
.el-checkbox {
    margin: 0 15px 0 0 !important;
}
.btnAdd {
    margin-top: 15px;
}
</style>